VRO removal or repair?

reelfishin

Captain
Joined
Mar 19, 2007
Messages
3,050
I picked up another 1985 90HP last night, good compression, free of corrosion and what looks to be a brand new lower unit and prop.
The only concern is that the VRO is apparently bypassed or blocked off and it was running on premixed fuel. The last owner said his 'mechanic buddy' disconnected it since VRO never works. My question is, can it run safely with just the oil lines plugged off and the wires unplugged?
If all the parts are there I'd be all for putting it back to original, but I think the metal manifold tube is missing. The rest all looks to be ok, the VRO pump even looks new, like they were fooling around with it and gave up. The motor shows no signs of ever having any trouble, but it's had a few home grown repairs which I suppose were done by his so called mechanic. It's got a touch of wiring disease and the controls were hardwired with butt connectors bypassing the red connector. They put on a new rectifier, but left the old one still in place and just found a new location to add the new one then simply clipped the wires off the old one. It wasn't running when I found it, but after swapping out the harness and cleaning up the wires it started and runs good, the compression is 129 even on all four and by looking at the fuel in the tank, they were pretty liberal with the oil, I'd guess that they were running it with at least double the needed oil. The gas in the tank is dark green with WAY too much oil. I got the impression that they never really got this thing to the water and gave up, which was probably a good thing in that they didn't get a chance to ruin the motor.

Anyone ever just disconnected the oil side of the VRO and run it that way?
Anyone got any good pics of an 1985 with the VRO pump all still intact?
My other 1985 already had the VRO removed when I got it.
 

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: VRO removal or repair?

if you want to spend $350 for a OMS pump, which is the recommended replacement, go for it. other wise they did the disabling correctly. 50:1 and run the heck out of it. all of mine are disconnected, even my 1993 40, because it came that way.
 

ezeke

Supreme Mariner
Joined
Sep 19, 2003
Messages
12,532
Re: VRO removal or repair?

Probably half the boats with original VRO pumps are running premix. My 1988 VRO2 has been running premix that way since new and is still perfectly functional. As long as the pump performs as a premix pump, there really is no reason to change it. When it does not, there are better pumps. The VRO pumps were discontinued in 1992 in most cases for the OMS system.

Here is a link that may give better understanding. http://continuouswave.com/whaler/reference/VRO.html
 

racer-x

Cadet
Joined
May 23, 2008
Messages
23
Re: VRO removal or repair?

Just run premix.
No sense guessing whether the system is pre-mixing.

Unless you have the alarm system correctly hooked up, and it is functioning properly, and you hear that alarm before the sound of rings biting into your engine block......:eek:
 

kenmyfam

Supreme Mariner
Joined
Aug 10, 2006
Messages
14,397
Re: VRO removal or repair?

My VRO is still connected and running fine. This post just reminded me to check the warning horn again for this season. I will most likely by-pass it eventually for peace of mind.
Enjoy your new find.
 
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